//764
include[HTML_REMOVED]
include[HTML_REMOVED]
int main()
{
int j;
char a[100],b[100];
gets(a);
for(j=0;j<strlen(a)-1;j++)
b[j]=a[j]+a[j+1];
b[j]=a[0]+a[strlen(a)-1];
b[j+1]=’\0’;
puts(b);
return 0;
}